Lahlali Issam

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Top Stories by Lahlali Issam

According to the MVC definition from wikipedia: "Model View Controller (MVC) pattern creates applications that separate the different aspects of the application (input logic, business logic, and UI logic), while providing a loose coupling between these elements." But if we search for MVC frameworks we found many variants: MVC1, MVC2, MVC3, MVP, MVVM and PureMVC. The question is which one is the best to use? As with any debate like that, there's no unique solution as it depends on many factors. In this article we try using JavaDepend to discover PureMVC in-depth, and talk about the main difference between it and the other variants. PureMVC was popularized first by Flex and Flash developers, but it was ported after to many other langugages.The following GWT sample uses the Java PureMVC framework. Let's analyze it to explore PureMVC concepts. PureMVC Basic Concepts Her... (more)

Lessons to Learn from the Hibernate Core Implementation

Hibernate is an open source Java persistence framework project. Perform powerful object relational mapping and query databases using HQL and SQL. In general the widely used libraries are well designed and implemented, and it's very interesting to learn from them some coding best practices. Let's take a look inside the hibernate core library and discover some of its design keys. In this post Hibernate Core is analyzed by JArchitect to go deep inside its design and implementation. Package by Feature Package-by-feature uses packages to reflect the feature set. It places all items re... (more)

Cassandra Nodetool Internals

Relational database management systems are the most commonly used system to store and use data, but for extremely large amounts of data, this kind of system doesn’t scale up properly. The concept of "NoSQL"(Not Only SQL) has been spreading due to the growing demand for relational database alternatives. The biggest motivation behind NoSQL is scalability. NoSQL solutions can offer a way to store and use extremely large amounts of data, but with less overhead, less work, better performance, and less downtime. Apache Cassandra implements the “NoSQL” concept. It was developed at Faceb... (more)

Spring: The Art of Using GRASP Patterns

When we searched for design pattern articles, we found documentation concerning "Gang of Four" patterns. They are very useful and contribute to a well-designed application. But when I discovered GRASP principles , I advised any one interested to improve his skills design to look at these principles. It gives the fundamental rules of design. In this article we will discover some GRASP principles used by Spring, and the advantages of using them. Spring is one of the most popular application developement framework for entreprise Java. The Spring Framework does not impose any specific... (more)

Five Years Waiting for JRE 7: Is It Justified? (Part 1)

JRE 6 was released in 2006, five years after a major JRE version was released. For the past few years Java was looking stagnant, and many Java developers began to worry; this concern was amplified when Oracle purchased Sun. We will try to discover if there's a big refactoring or maybe many features were added that can explain the time span between these two releases. In this first part we will focus on design and implementation changes, and the second part will focus on added features and breaking changes. With JavaDepend we can compare two versions and detect any modifications ... (more)